upstream changes:
-----------------
Version 1.0.26
* Updating p1_utils to version 1.0.21.
* Update travis config
Version 1.0.25
* Updating p1_utils to version 1.0.20.
Version 1.0.24
* Fix compilation with Erlang/OTP 23.0
Version 1.0.23
* Updating p1_utils to version 1.0.19.
* Fix compatibility issues with Erlang 23
Version 1.0.22
* Updating p1_utils to version 1.0.18.
* Mark p1_utils app as dpendency in .app file
* Remove usage of statics in c code, which allows for live upgrade of nif component
Version 1.0.21
* Updating p1_utils to version 1.0.17.
Version 1.0.20
* Updating p1_utils to version 1.0.16.
* Make it possible to set type of the ets_cache
* Add cache support for grow-only counters
* Export ets_cache:tag() type
Version 1.0.19
* Updating p1_utils to version 1.0.15.
* Expand ets_cache API
Version 1.0.18
* Updating p1_utils to version 1.0.14.
* Add contribution guide
Version 1.0.17
* Add ets_cache:insert/3,4 functions
Version 1.0.16
* Updating p1_utils to version 1.0.13.
Version 1.0.15
* Updating p1_utils to version 6ff85e8.
* Don't compile ets_cache to native code
* Use rand:unifor instead of crypto module
151a5c04da